it's the entire laguna madre.
basically, look at the road that goes out to the island (358), and when you're on the JFK causeway, you can basically hunt any of that water. take a drive when you get down here... duck blinds everywhere. I Live in flour bluff, and every year see people wading out to their duck blinds from the road. I wouldn't recommend that.. it's "legal", but you have to make sure you're a certain distance away from any houses, and if you get too close, people will complain. not sure, but maybe 1000 yards? (total guess). if you have a boat, it really opens up some area to hunt.
night hawk bay, laguna, baffin bay, etc. tens of thousands of acres of duck hunting. I don't know anything about it, as I've never duck hunted at all.... it's public land, so once you build a blind, it's legal for someone else to hunt it. There's generally a code that most people won't hunt blinds that aren't their's, but it does happen.
everything in the red is legal (I think) there are duck blinds all over the place in those areas. as far as deer hunting, unless you want to spend some money, it's going to be tough to find a decent place.